Swivel attachment-plug.



Patented J 11110 26, 1917 2 SHEETSSHE ET l.

INVENTOR WI TNESS:

, X x 4110mm.

0. KESSLER. SWlV-EL ATTACHMENT PLUG. APPHCATION FILED IULYZY. (916. 1,231 .379. Patented June 26, 1917 2SHEETSSHEET 2.

WITNESS: r M R I or), v .OY QKQSQeT- m 1 n Fe T ATTORNEY UNITED sTATns PATENT ormon.

OTTO KESB IIEB, OF PASSAIC, NEW JERSEY,

swIvaL ATTACHMENT-PLUG.

' Application filed July 27,

To all whom it may concern:

Be it known that. I, O'i'ro Knssnns', a citizen of the United States, residing at Passaic, :in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Swivel Attachment-Plugs, of which the following is a specification.

This invention relates to those attachment devices for electric wires inwhich there are a plug element to be fitted into a socket i and a wireattachment element swiveled together, and it consists in certain improve ments in such devices having for their principal object to permit freedom of swiveling movement with maintenance of perfect elec tric contact between the elements,- produce simplicityand economy of construction and promote facility of assembling the parts of the device and attaching the wires.

In the accompanying drawings,

1 is a side elevation of the device showing the socket in dotted outline;

. Fig. 2 is a longitudinal sectional view of the device;

Fig. 3 shows the insulating member of the wire attachment element in perspective;

Fig. 4 showssaid member in transverse section;

Figs. 5, 6 and 7' show the fittings applied to sand member in perspective;

Fig. 8-shows the parts of the spindle in side elevation? Figs. 9 and 10 are perspective views of the insulating member of the plugelement and Fi 11 isa plan of the plug element;

Fig. 12 shows a modification of the plug element in section;

Fig. 13 is a erspective view of a contact device carried y the plug element; and,

Fig. 14 shows in plan and in transverse section a contact disk which is preferably interposed between the elements.

The plug element includes an insulating body or member a of cylindrical form, with a flange b at one end to be gripped by the thumb and finger in turning the plug. The member a is provided with a metal contact 0, in the present case being a' threaded sheath. The enterin end of the member a has an upstanding oss d which is rectangular in plan (Fig. 11) penetrating a rectangular hole in the end of the sheath, saidhole fitting the boss, which thereby keeps the sheath from turning thereon. Member a has an 55 axial bore 6 penetrating the same and its boss. fis a hole extending parallel with the bore 0 through member-(1.. An annular disk Specification of Letters Patent;

Patented June 26,191 1'. 1918. Serial R0. 111,681.

9, having small knobs or bosses h pressed therein and projecting away from member a, bears against the flat end of member a which 00 is provided with the flange b, and said disk has an integral stem 71 which projects through the hole I and has its free end bent over, as at 7' and in electrical contact with the inner surface of the end portion of the-sheath c, 66 a screw is being driven through the sheath and the end 7' of said stem into member a. Thedisk g snugly receives an integral lowlying stud Z on the outer end of the member a. In view of the foregoing it will be 70 seen that the plug element is quite simple in construction, that its parts may be readily assembled and that when they are assembled they will permanently retain their intended relation to each other notwithstanding the displacing influence of the forces operating when the plug is fitted to the socke which is indicated in Fig. 1 by the dotted outline m. A modification of the plug is shown in Fig. 12 in which the free end 9" of the stenr'z" is so bent outwardly and downwardly again so as to have contact with not only the end but the cylindrical portion of the sheath 0, the screw is, screwed into the member a, penetrating only the sheath.

The wire attachment element includes cylindrical insulating body or member n having at its inner end an integral low-lying stud 0 and penetrated by an axial bore In one side of member a a wide slot g is formed longitudinally thereof, the same having a countersink 1' extending from the outer end of member 1 toward but not to its inner end thus leaving a shoulder 8 at the bottom of the countersink is a plain hole t. 'Diametrically opposite the slot 9 there is formed anotherslot a which extends from the outer end toward but not to the inner end of the member n and has a hole '0 at the bottom thereof. From the outer or free end of this slot across the outer end of member n toward but not to the side thereof having the. slot 9 there is formed another slot to. An' angular slot is thus produced by the slots u, w. w is an annular split disk preferably '106 formed with a bend at y and bearing against he inner end of member n, receiving snugly the studo," it has a shank a upstanding there'- from and formed with a hole 2, the end of the shank being bent inwardly. A rectanular nut 4 is received in the countersink r5 ein trwversedby the shank, one face of the nut bearing against the shoulder a and the other against the bent-oil end 3 of the shank Preferably,

and into this nut, penetrating the hole 2 in the. shank, is screwed the screw 5, whose nner end is engaged with the plain hole t .m the countersink r. It will be noted that the screw is not screwed into the hole t (which construction might lead to stripping the threads in the soft material of the member 11.) but that the parts are retained in place because of the angular form of the element wz and the fact that it is held from lateral displacement b the stud o and longitudinal displacement by the enga ment of the screw in the hole at. A metafiic angle piece 6, having one arm lying in the slot to and having screwed into it a screw 7 which engages in the hole 1) and its other arm lying in the slot w and formed with a hole 8, is secured to the member n b said screw and the swivel element of the device, as will now appear.

Said swivel element is a spindle 9 in the form of a screw, the same penetrating bores e, p'of the members a and n, its head 10 being countersunk in the boss d and afi'ording a contact portion and its other end being threaded and penetratingthe hole 8 of the angle piece 6 and receiving a nut 11 which may be prevented from disen agement by splitting and then upsetting said end of the spindle (compare Figs. 8 and 2). r

the bent split disk :2: acts as aspring to maint'a'n the annular and an nularly channeled disk 12, shown in Fig. 14, against the circular series of bosses it of the disk 9. When the nut on the spindle has been tightened the, arrangement-is such, on account of the described construction of the parts 9, a: and 12, that the wire attachment member ma be turned with perfect freedom although tlie spindle binds the parts together so firmly as to produce a perfect electrical contact.

The wires 13 and 14' are respectively attached at their ends to the screws 5 and 7; and these latter being on the sides of the wire attachment device are readily accessible. It will be noted that the mannerlof connecting the wires substantially as'shown is such as to aflord substantial resistance to any strain imposed upon them, due ;to the device a: 2 bearing against the inner end of member n and the angle piece 6 being supported by the spindle and by the engagement of screw 7 in the plain hole 1).

e attachment element is preferably equipped with a bell-shaped sheath 15 of insulating material slipped over the member a and secured thereto y screws 16 (Fig.- 1), its inner edge beingreceived in an annular groove 17 in the member a. Its restricted outer end, if a knob 18 is formed in the wires within the shell, will assume any strain imposed on the latter.

' the plug and said member and It will be understood that the circuit from one wire will be through the pa 6 and the terminal afi'orded by part 9 to on contact in the socket m and from the other wire through the parts z-:c, 12, 9-55, and the terminal afforded by part etc the other contact of the socket.

Having thus fully described what I claim as new Letters Patent is i 1. In a swivel attachment device, the combination, with an insulating plug, otan insulating wire attachment member and a conductive spindle forming a swiveling axis for and penetrating and holding together aifording one on the plug,

my i'iivention, and desircito secure by terminal ofthe device, means reachin between said plug and member, to afford t e other terminal of said device, a wire bind-ing means on said member electricallyv attached to said spindle, and an other wire binding means includingan angular conducting device also reaching between the member and the plug and secured to the exterior of the said member and. a stud adapted to hold said conducting de vice against lateral displacement, said conducting device being in electrical connection wlith said terminal affording means on the P u 2: In combination, an insulatingplug and an insulating wire attachment memberhaving means to swivel-connect them affording one terminal of the device, a wire-bindin device on the member electrically connect-e tosaid means, another wire-binding device .on the member having contact means extending between the plug and said member, another terminal on the plug, and a conductive device on the plug electrically connected to the second terminal and having contact means between said plug and member, one of said means havin a circular series of integral knobs engaging the other.

3. In combination, an insulating plug and an insulating wire attachment member having means to swivel-connect them affording one terminal of the device, a wire-binding device on the member electrically connected to said means, another wire binding device on: the member having contact means ex tending between the plug and said member, another terminal on the plug, and a conductlve device on the plug electrically connected to the second terminal and havin contact means between said plug and mem er, one of said means having a circular series .of knobs and the other being a spring, and an annularly channeled conductive disk arranged hetween said means.

In testimony whereof I afiix my signature.

' o'r'ro KESSLER. 

